Not everyone clicks the same way on a laptop (CA/UK). Some, like myself, prefer to use the actual buttons because it’s more intentional and the tactile feedback is nice. Others prefer to tap the touchpad itself.

If you’re in the first group and you HATE accidentally tapping on the touchpad (and therefore accidentally clicking on something you didn’t mean to click), here’s a possible workaround that can disable that function in Windows 10.

I prefer a mouse if using buttons because I can easily keep my hand on it if the mouse is placed "normally" / appropriately.

This is not the same on a PC where the button are much closer to your body. This makes it easier to rest you hand on the PC and use the touchpad instead. Maybe if the buttons were at the top of the touchpad, things would be different.